24
Isolated digital input
VCC
GND
IDI0~IDI3
Internal
External
IDI COM
DC
(5-30V)
Figure 3-4: Isolated digital input connections
Isolated digital output
Isolated
Protection
Circuit
TTL
level
TTL
level
Internal
IDO0~IDO3
External
EGND
Figure 3-5: Isolated digital output connections